The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2025
Filed:
Dec. 01, 2022
Coretronic Corporation, Hsin-Chu, TW;
Ching-Feng Hsieh, Hsin-Chu, TW;
Chih-Chen Chen, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
An interactive rear projection system including a projection screen, a projection optical engine, an input device and a controller is provided. The projection optical engine emits a projection beam which is projected on the projection screen. The input device includes a sensor and a first light source both disposed on a first side of the projection screen. The controller is electrically connected to the projection optical engine, the sensor, and the first light source and controls the first light source to project a first beam toward the projection screen. When an object approaches a second side of the projection screen, the sensor senses a light spot generated by the first beam diffusely reflected by the object and recognizes a position of the object or a position where the object touches the projection screen according to the light spot.